Soapstoning device



May 2, 3933. c. 5:. MCQORMECK 15,96,866

SOAPSTONING DEVICE 4 Sheets-Sheet 1 Filed May 15, l95l .Qflamwmi.WCaxWakINVED/TOR.

AILTORNEY May 2, 1933. c. E. M CORWGK SOAPSTONING DEVICE 4 Sheets-Sheet2 Filed May 15, 1951 May 2, 1933. c. E. MCCORMICK SOAPSTONING DEVICEFiled May 15, 193i 4 Sheets-Sheet 5 Qwxn-w1%. WCM INVENTOR.

ATTORNEY all Patented May 2, 1933 rarer CLARENCE E. MCCORMICK, F POLAND,OHIO, ASSIGNOR TO THE REPUBLIC RUBBER 4 COMPANY, OF YOUNGSTOWN, OHIOSOAPSTONING DEVICE Application filed May 15, 1931.

This invention relates generally to apparatuses for dusting adhesivesurfaces with non-adhesive material and has particular relation to anapparatus of above designated character for coating the interior surfaceof a rubber tube as it is formed in a tube machine.

A principal embodiment of the invention comprises an apparatus having aninflatable bag as a part of a pulsating unit providing .a periodic blastof air for the purpose of carrying small quantities of powderedsoapstone, or other suitable non-adhesive material, from a chamberformed in a lower portion of a container which also contains aninflatable bag and is operatively associated with the pulsating unit.

A further object of the invention is to provide means for controllingthe amount of non-adhesive material injected into the blast of air.

A further object of the device is to provide means of regulating thefrequency of pulsations made by the pulsating unit.

A still further object is to provide means for the prevention ofclogging of the non-adhesive material in the chamber in which the sameis carried, as the same is carried out into a blast current leading toan inner surface of a rubber tube which is being formed in a tubemachine.

With the foregoing and other objects in view which will appear as thedescription pro ceeds, the invention resides in the combination andarrangement of parts and in the de tails of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, can be made within thescope of what is claimed, without departing from the spirit of theinvention.

The invention is illustrated in the accompanying drawings, whereinFigure 1 is a side elevation of the device.

Figure 2 is a vertical section taken substantially on line 22 of Figure1, showing parts broken away.

Figure 3 is a detail view of Figure 2.

Figure 4 is a top plan view of the device with parts broken away.

valve seat 7 in Figure 6.

Serial No. 537,555.

Figure 5 is a cross section taken on line 55 of Figure 2.

Figure 6 is a cross section taken on line 66 of Figure 4. 1

By referring tothe drawings it will be seen that in practice the deviceis portable and is attached to an air line 1. This air line 1 isprovided with a valve 2 for the purpose of regulating the flow of air inthe air line 1. This valve 2 is connected to a coupling 3 which leads toa compression chamber 4 within a valve unit 5. This valve unit 5 carriesa valve 6 which is shown seat-ed upon :1 There are two openings fromthis compression chamber 4 which is directly above the valve 6. Oneopening leads to a tube 8 which has its other end connected to an aircoupling 9 which is secured to a removable cover 10 of a container 11.The second opening is connected to a tube 12 which has its lower endconnected to a coupling 13 which is connected to a valve 14 which issecured to an air coupling 15 which is connected to an inflatable bag 16within a chamber 17. It will be seen that the chamber 1'? is supportedby means of an arm 18 which is a continuation of one of support legs 19of the device which are se cured to the container 11.

By referring to Figure 6 it will be seen that the valve 6 is seated,thereby causing the air coming through the air line 1 to flow throughthe tube 8 which is connected indirectly to an inflatable bag 20 whichis positioned in the upper portion of the chamber 11. The air also willflow through the tube- 12 into the inflatable bag 16 which is located atthe bottom of the chamber 17. It will be seen that the inflatable bags16 and 20 are now being inflated.

Air is now entering from the air line 1 through the valve 2 into thecompression chamber 4, and a portion of the air passes through the tube8 leading to the inflatable bag 20. The inflating of the inflatable bag20 seats a valve 21 upon a valve seat 22. The inflatable bag 20 forcesdownwardly a disc 23 which is positioned upon an upper end of a valverod 24. This valve rod 24 is provided with a pin 25 which holds aretaining washer 26 from slipping upwardly upon the valve rod 24.Functioning between the valve seat 22 and underneath the retainingwasher 26 there is provided a coil spring 27 which will unseat the valve21 when the inflatable bag has reached a predetermined state ofdeflation. It will also be seen that a portion of the air now issimultaneously flowing through the tube 12 which indirectly connects tothe inflatable bag 16. When this inflatable bag 16 reaches apredetermined state of inflation, a disc 28 is carried upwardly.Centrally attached to this disc 28 there is a stem portion 29 whichcarries an adjustable pin 30 provided with an adjustable spring seat 31.Between the adjustable spring seat 31 and a disc 32, which functionswith a depended end 33 of the valve 6, there is positioned a coil spring34. It will also be seen that there is provided a. secondary coil spring35 which has its upper end seated against the disc 32 and its lower endseated against the disc 28. This secondary coil spring is larger-indiameter and functions outside or the coil spring 34. There is alsoprovided a third coil spring 36 which functions between the disc 28 anda top piece 37 of the chamber 17 at a point 38. This coil spring 36 hasits upper end functioning about a depended core portion 39 of the valveseat 7. As the inflatable bag 16 expands pressure is increased in thecompression chamber 4 and a continued and increased upward thrust ismaintained by the coil springs 34 and 35 until a point predetermined isreached where the pressure of the springs 34 and 35 overbalances that ofthe air in the compression chamber 4 and the downward thrust of the coilspring 36. At this time the valve 6 will be lifted from its seat 7allowing the air confined in the inflatable bags 16 and 20 to rush outthrough the valve 6 into a chamber 40. A part of the air now goes out ofthe chamber 40 through an opening 41 of a tube 42 the lower end of whichconnects to a chamber housing 43 leading to a chamber 44. A supply ofsoap-stone is contained in the container 11 and intermittent movementsof the valve assembly lowers charges of the soap-stone on a washer 45from which the soap-stone will be blown on and out of an outlet tube 46by correspondingly timed pufls of air from the tube 42. The balance ofthe air escapes through a vent in a side Wall of the chamber 40. It isobvious that when the inflated bags 16 and 20 are being deflated thevalve 6 remains open and is held in this position by means of the coilspring 35. The valve 6 will again be closed when nearly all the air hasbeen expelled from the inflatable bags 16 and 20. The air pulsations areproduced by means of the seating and unseating of the valve 6 which iscaused to act by the inflating and deflating of the inflatable bags 16and 20 which are inflated and deflated simultaneously. As the air blastcomes through the tube 42 into the chamber 44 the soap-stone which hasentered the chamber 44 and rests upon the washer 45, is carried by theair blast down through the chamber 44 into the outlet tube 46 which isconnected to any suitable tube machine. Tube machines are ordinarilyconstructed with a central opening providing for means for carryingnon-adhesive materials into interiors of the rubber tube.

By referring to Figure 2 it will be seen that as the valve 21 is movedup and down on its valve seat 22 an agitation in the container 11 takesplace due to the compression and extension of the coil spring 27 and awasher 47 which is positioned at a reduced portion 48 on the valve rod24. It is important that the soap-stone be prevented from caking orotherwise obstructing easy passage through the valve 21.

By referring to Figure 3 it will be seen that the valve 21 is in an openposition and the washer 45 has clicked up against a bottom of a valveseat 49 of the valve 21. It will also be seen that the washer 45 isagainst the bottom of the valve seat 49 and holds the soap-stone uponthe same until lowered, as shown in Figure 2, when the air blast comesthrough the tube 42 carrying the soap-stone through the chamber 44 intothe outlet tube 46. It is also obvious that this movement of the valve21 is intermittent and timed with the action of seating and unseating ofthe valve 6. In order to provide for adjustment there is provided anadjustable handle 50 which carries a threaded stem 51 which in turncarries an adjusting nut 52. This adjusting nut 52 is provided withoppositely disposed prongs 53 for the purpose of preventing the nut fromrotating.

In order to control the frequencies of the pulsations of the inflatablebags 16 and 20 there is provided a valve 2 which may be adjusted and avalve 14, which, when adjusted, regulates the rate of collapse of theinflatable bags 16 and 20.

What I claim is 1. In a device of the class described, a container forpowdered material having an intermittently movable valve at its lowerend, an inflatable bag and cooperating spring device for moving saidvalve, a pipe adapted to deliver successive blasts of air to thematerial discharged by the valve, an air supply line'having a branchvleading to said inflatable bag and a. branch leading to said pipe, avalve in the latter branch, and means for intermittently operating saidvalve including a chamber, an inflatable bag therein connected to movethe valve, and a branch pipe connecting the last-named inflatable bagwith the air supply line.

2. In a device of the class described, a container for powdered materialhaving an intermittently movable valve at itslower end,

an inflatable bag and cooperating spring device for moving said valve, apipe adapted to deliver successive blasts of air to the materialdischarged by the valve, an air supply line having a branch leading tosaid infiatable bag and a branch leading to said pipe, a valve in thelatter branch, and means for regulating the frequency of theintermittent operations of said valve including a chamber, an inflatablebag therein connected to move the valve, and a branch pipe connectingthe last-named inflatable bag with the air supply line.

3. In a device of the class described, a container for powdered materialhaving an intermittently movable valve at its lower end, an inflatablebag and cooperating spring device for moving said valve, a pipe adaptedto deliver successive blasts of air to the material discharged by thevalve, means for varying the quantity of the powdered material deliveredby each blast of air, an air supply line having a branch leading to saidinflatable bag and a branch leading to said pipe, a valve in the latterbranch, and means for regulating the frequency of the intermittentoperations of said valve including a chamber, an inflatable bag thereinconnected to move the valve, and a branch pipe connecting the last-namedinflatable bag with the air supply line.

In testimony whereof, I aifix my signature:

CLARENCE E. MCCORMICK.

